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Evidencia en contra de un desplazamiento al rojo z > 6 para la galaxia STIS123627+6217555
D Stern1, P Eisenhardt, H Spinrad
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91109, USA. stern@zwolfkinder.jpl.nasa.gov
Nature
|December 16, 2000
Resumen
Las galaxias con altos desplazamientos al rojo son cruciales para comprender la formación temprana de galaxias. Las nuevas observaciones de STIS123627+621755 contradicen su corrimiento al rojo previamente sugerido de 6.68, lo que indica que es probable que esté más cerca.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Cosmología Cosmología.
Sus antecedentes:
- La identificación de galaxias lejanas ofrece información directa sobre la formación temprana de galaxias.
- Las galaxias de alto desplazamiento al rojo (z > 5) son débiles, lo que dificulta la interpretación y identificación de los datos debido a las bajas relaciones señal-ruido.
Objetivo del estudio:
- Para investigar el desplazamiento al rojo de la fuente de la galaxia STIS123627+621755, se propuso anteriormente que estuviera en z = 6.68.
- Para verificar la distribución de la energía espectral y las propiedades de observación de STIS123627+621755 a alto corrimiento al rojo.
Principales métodos:
- Se realizaron observaciones ópticas e infrarrojas cercanas de la fuente de la galaxia STIS123627+621755.5.
- Analizó la detectabilidad de la galaxia a 6.700 Å y su no detectabilidad a 1.2 microm.
Principales resultados:
- La galaxia STIS123627+621755 fue detectada a 6.700 Å.
- La galaxia no fue detectada a 1.2 microm, lo que contradice las expectativas de un corrimiento al rojo de z ≈ 6.68.
- Los datos de observación sugieren fuertemente un corrimiento al rojo inferior a 6 para STIS123627+621755.5.
Conclusiones:
- Los datos ópticos y del infrarrojo cercano observados desafían el corrimiento al rojo previamente asignado de 6,68 para STIS123627+621755.5.
- Los hallazgos requieren una revisión del corrimiento al rojo para STIS123627+621755, colocándolo en z < 6.
- Este estudio pone de relieve las dificultades para identificar e interpretar datos de galaxias extremadamente distantes.
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